42042315 has 32 divisors (see below), whose sum is σ = 79534080. Its totient is φ = 18555264.

The previous prime is 42042313. The next prime is 42042317. The reversal of 42042315 is 51324024.

It is an interprime number because it is at equal distance from previous prime (42042313) and next prime (42042317).

It is not a de Polignac number, because 42042315 - 2¹ = 42042313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 42042291 and 42042300.

It is not an unprimeable number, because it can be changed into a prime (42042311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3859 + ... + 9948.

It is an arithmetic number, because the mean of its divisors is an integer number (2485440).

Almost surely, 2^42042315 is an apocalyptic number.

42042315 is a deficient number, since it is larger than the sum of its proper divisors (37491765).

42042315 is a wasteful number, since it uses less digits than its factorization.

42042315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13851.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42042315 is about 6484.0045496591. The cubic root of 42042315 is about 347.7193618680.

Adding to 42042315 its reverse (51324024), we get a palindrome (93366339).

The spelling of 42042315 in words is "forty-two million, forty-two thousand, three hundred fifteen".